3620809 has 4 divisors (see below), whose sum is σ = 3632080. Its totient is φ = 3609540.

The previous prime is 3620803. The next prime is 3620819. The reversal of 3620809 is 9080263.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3620809 - 2⁷ = 3620681 is a prime.

It is a super-2 number, since 2×3620809² = 26220515628962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3620803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5139 + ... + 5800.

It is an arithmetic number, because the mean of its divisors is an integer number (908020).

Almost surely, 2^3620809 is an apocalyptic number.

It is an amenable number.

3620809 is a deficient number, since it is larger than the sum of its proper divisors (11271).

3620809 is a wasteful number, since it uses less digits than its factorization.

3620809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11270.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 3620809 is about 1902.8423476473. The cubic root of 3620809 is about 153.5566180881.

The spelling of 3620809 in words is "three million, six hundred twenty thousand, eight hundred nine".